Wilhelm wicke



(No Model.)

. W. W'IGK-ELY 2 Sheets-Sheet 2.

ADJUSTABLE FURNITURE.

Patented Apr. 5, 1898.

w I y I NITED STA-Ties PATENT FFICE.

WILHELM WIOKE, OF CLEVELAND, OHIO, ASSIG'NOR TO THE CLEVELAND SCHOOL FURNITURE COMPANY, OF SAME PLACE.-

ADJUSTABLE FURNlT U- R E.

srncxrrcArrolif forming part of Letters Patent No. eo1,se2, dated April 5, 1898.

i Application'filed m jzmsss. Serial in. 600,666.- (No model.)

To all whom. it mag concern:

Be it known that I,WILHELM WVi'OkE,a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State ofOhio,

parts are supported upon two side standards,

which are ordinarily secured to the floor.

The objectof the inventionfis to provide novel mechanism for moving both sides of the movable portions simultaneouslyv up or down, and alsoto provide mechanism for this purpose which will permit one to dispense with separate fastening devices for securing the. movable parts at different elevations.

The invention consists in the construction and combination of parts hereinafter described and claimed.

In the drawings, Figure 1 is a rear elevation of a piece of furniture, including, desk, seat, and back, which embodies my invention. Fig. 2 is a sectional side' elevation on line 2 2 of Fig. 1. Fig. 3'is ahorizontal sec-- tional view on line 3 3 of Fig. 2. Fig. 4 is a horizontal section on line 4 4' of Fig. 2, and Fig. 5 is a view of an alternate construction of the parts therein shown.

Referring to the parts'by letters, A A represent the two side standards. Each is constructed with an upward extension a, a curved forward extension a, and the feet a said standards being in their general form substantially like the seat-standards, whichhave heretofore been in common use in non-adj ustable school-furniture.

The movable members of the piece of furniture, as shown, are the seat and back sup-- ports B Band the desk supports G G. The supports for the back and seat, except that they have no legs, are shaped approximately like the standards, having the upward ex-.

tensions b, to which the back H is secured, and the curved forward extensions b", to which the seat F is pivoted. The rear edges of the ports B B move.

extensions a of the standards AA, these engaging edges being formed at any desired angle to the floor-as, for example, at right angles as shown-depending upon the direction in which it is desired to have the sup The front edge of the part ais made V-shaped, preferably, and the angularlydisposed lugs, which project in opposite directions from the rear edge of the part b, formfa guiding-groove in which said V shaped edges of the parts 'a lie, whereby the sidewise movement of the supports is pre vented. A'curved finger a which projects forward from each part Ct, passes in front of a vertical rib b on the part b and acts to pre- .theinne'r side of each standard is formed or 'vent the forward movement of the part'b out secured a'stud a, on which is journaled' a pinion O, with which is rigidly connected a bevel-gear c. Intwo ears a a on the inside of each standard is journaled a screw D, on

screw D screws through the end of this arm.

Adjacent to the pinions Ca hole a is formed in eachstandard A, and these holes form the bearings for'a removable operating-shaft E, carrying pinions e, which engage with the pinions O. The turning of this shaft causes the revolution of the screws, whereby both supports are simultaneously moved up or down. It is unnecessary to employ any fastening devices to hold the supports in any position, because a force tending to move the said supports up or down can never be great enough to cause the revolution of the screw, without which the supports cannot move.

Some criticism'may be made to the construction shown'for the reason that the weight of the supports and all that they carry is 5 borne directly by the bevel-gears c and the stud a I have found by actual experiment an alternative construction the screw D may be formed with an annular flange d, which rests upon the car a as shown in Fig. 5.

The desk-supports G are moved up or down by like mechanism. The vertical members g of said desk-supports lie just inside and in contact with the parts a of the standards. The desk-supports are guided by an ear a secured to the part a and projecting through a vertical slot g in the part g, and also by ribs 9 on the desk-support, which projects into vertical grooves a in part a. The car a and another ear a on each standard furnish bearings for a screw J, which screws through the arm g of the desk-support and has a bevelgear j secured to its lower end. Each screw screws through an arm g on the desk-supports.

. On a stud a on the inside of each standard is journaled the pinion K, having rigidly secured to it the bevel-gear 70, which meshes with the bevel-gearj. said pinions, serve as bearings for the same operating-shaft E, whereby the pinions K, and

consequently the screws J, are revolved with the result of moving the desk-supports up or down.

The shaft E, which may be removably mounted in the holes a or at, is provided with pinions e forengagement with either the pinions 0 or K. Preferably these pinions e are formed by corrugating the shaft from end to end, as shown.

I hereby disclaim the combination, with the end frames made in separate sections and provided with cleats adapted to secure them one to the other in vertically-adjustable po-- screws, simultaneously, substantially as and sitions, of adjusting-screws foreach of the end frames and an operating device for simultaneously operating the adj usting-screws, as I am not the first inventor of said combination of parts.

Having described my invention, I claim I 1. In adjustable furniture, the combination of two standards having each a hole for the Holes a, adjacent to screws, and a rigidly-connected pinion and beveled gear mounted upon the inner side of each standard adjacent to'said holes therein,

' with the movable members which slide upon said standards, an arm rigid with each of said members with which said screws engage, and an operating-shaft adapted to be removably mounted in said holes and having pinions which engage with the pinions hereinbefore named, substantially as and for the purpose specified.

2. In adj ustable furniture, the combination of two standards, each having on its inner side two ears as a a rigidly-connected pinion and beveled gear mounted on'the inner side of each standard, said standards having each a hole for the reception of an operating-shaft, with two desk-supports which slide respectively against the inner sides of said standards, andhave each a slot through which the ear a projects, an inwardly-projecting arm, and a screw engaging with said arm, and mounted in the two ears a a and a bevelgear secured to said screw, substantially as and for the purpose specified.

3. In adjustable furniture, the combination of two standards, each having on its inner side two ears a a", and a vertical groove'a and an operating-screw mounted in said ears, with two desk-supports each having a vertical slot through which the ear a projects, and a rib g which projects into the vertical groove a arms on said supports with which said screws engage, and mechanism for turning said for the purpose specified.

In testimonywhereof I affix my signature in presence of two, witnesses.

WILHELM WIGKE. Witnesses:

E. L. THURSTON, E. B. GILCHRIST. 

